Apparatus for assembling memory matrix components



March 23, 1965 V D. P. DAvs 3 3 APPARATUS FOR ASSEMBLING MEMORY MATRIXCOMPONENTS Filed Dec. 14, 1952 3 Sheets-Sheet fi; a

l 37 %jj/MENTOR 1 I azgzczs' 73 7 BY March 23, 1965 Filed Dec. 14, 1962MATRIX COMPONENTS 5 Sheets-Sheet 2 D. P. DAVIS APPARATUS FOR ASSEMBLINGMEMORY INVENTOR. ozgs fzzs.

l I o &4 25 215 March 23, 1 965 D. P. DAvls 3174214 APPARATUS FORASSEMBLING MEMORY MATRIX COMPONENTS Filed Dec. 14, 1962 5 Sheets-Sheet 3INVENTOR. azzg' ..z

United States Patent O 3,174,214 APPARATUS FOR ASSEMBLNG NIEMORY MATRIXCOMPONENTS Douglas P. Davis, 911 E. Ehnwood Ave., Burbanlr, Calif. FiledDec. 14, 1962, Ser. No. %4,617 8 Claims. (Cl. 29-203) This inventionrelates to methods and devices for assembling small parts and moreparticularly to the assembly of memory matrices employed in electricaland electronic computer devices. Such matrices comprise a series of verysmall paramagnetic rings hereinafter referred to as cores" arranged in aconfiguration (usually rectangular) and having wires running throughthem in at least two directions normal to each other constituting,respectively, the so-called "X and Y axes of the matrix. A common sizeof these cores is .0S" O.D., .030" LD. and .0l6" thick and a completematrix usually comprises 64 rows of 64 each of these cores or 4,096cores having .005" wires running through the holes thereof in bothdirections, the cores in each row being positoned diagonally to thewires and being arranged in alternate diagonal relation to each other inthe said rows. Hand assembly of these matrices is a most tedious andexacting work and under the best conditions, a skilled worker requiresanywhere from 10 to sometimes as much as 40 hours to complete theassembly of the wires and cores for a single matrix. This time excludesother time thereafter required to connect the wires to a supportingframe construction.

An object of the invention is to provide means for positioningsuccessive pluralities of cores for simultaneous entry thereof by one ofthe axis wires and including means for simultaneously reversing thepositions of the cores of each successive plurality thereof relative tothe preceding plurality of cores.

Another object of the invention is to provide a means for simultaneouspositioning of the plurality of cores employed in the formation of acomplete matrix in position to receive the wires constituting the X aXisand the Y axis of the matrix.

Still another object of the invention is to provide a machine forassembling the cores and axis wires of matrices characterized bycapacity to project the wires of at least one of the matrix axes througha plurality of cores in a single step or portion of a cycle of operationof a machine.

With the foregoing objects in view, together with such additionalobjects and advantages as may subsequently appear, the invention residesin the hereinafter described method of assenbling electronic matricesand in the parts and the Construction, combination and arrangement ofparts of certain devices useful in the practice of the said improvedmethods, all of which is disclosed, by way of example, in the followingspecification of a device constituting a presently preferred embodimentof the invention, reference being had to the accompanying drawings whichform a part of said specification and in which drawngs:

FIG. 1 is a fragmentary plan view, greatly enlarged, of one corner of atypical matrix of the type with which the present invention isconcerned,

FIG. 2 is a perspective View, further enlarged of a single core and theX" and Y axes wires passing therethr ough,

FIG. 3 is a side elevational View of a machine constituting oneembodiment of the novel apparatus for assembly of matrices using themethod of the present invention,

FIG. 4 is a top plan View of a machine shown in FIG. 3,

FIG. S is a sectional View taken on the line 5-5 of FIG. 3; a portion ofa cover plate element being broken away to show the magazine means forthe cores and also ICE showing the mode of insertion of an "X" axis wirethrough a plurality of cores,

FIG. 6 is a greatly enlarged view showing the method of inserting the Xaxis wires through a plurality of cores,

FIG. 7 is a top plan view of the core holding means of the machine withthe core holding means positoned for insertion of the Y axis wires inthe plurality of cores held thereby,

FIG. 8 is an enlarged fragmentary plan view of the core orienting orpositioning means with the cover plate removed to show details concealedthereby,

FIG. 9 is a further enlarged scale, sectional side elevational viewtaken on the staggered line 9-9 of FIG. 4 and particularly showing thecore magazine means and the mode of inserting the Y axis wires throughthe cores,

FIG. 10 is a View similar to FIG. 9 but showing the cores stacked on theY aXis needle means,

FIG. 11 is a fragmentary top plan view of the core holding means showingthe orientation of the plurality of cores tor entry of the individual Yaxis wire inserting needles therethrough,

FIG. 12 is an enlarged scale, sectional view of the core holders asviewed on the line 12--12 of FIG. 11 and FIG. 13 is a side elevationalView of the holding means for the cores particularly showing as amodification, the use of electromagnets for retaining the cores in theholding means therefor.

Referring first to FIGS. 1 and 2, each matrix comprises a frame or baseF of rigid, non-conductive sheet material, usually having the sidesthereof defining a rectangular opening O and across which opening the X"axis wires extend in parallel spaced relation in one direction while theY aXis wires extend .across the opening in a direction at right anglesto the X wires in a corresponding spaced relation, alternate ones ofeach group of wires having terminals T at opposite sides of the opening.At each intersecton of an X axis wire with a Y axis wire, they both passthrough a core C causing the core to be positoned diagonally withrespect to the two axes. These cores are so positoned that the axes ofadjacent cores along any one wire extending in directions normal to eachother. The invention is concerned only with the initial assembly of thecores and the wires and not with the step or steps of mounting theassembled matrix cores and wires upon the supporting frame.

Referring next to FIGS. 3 through 13, there is shown a device forpractice of the method of the invention, it being understood from thedimensions of the matrix components previously set forth, that thefigures show the machine in greatly enlarged scale. The illustratedmachine comprises a rectangular base 1 having a pair of posts 2, 2rising therefrom adjacent to the rear edge thereof and also adjacent theside edges of said base. Mounted on these posts in spaced relation abovethe base 1 is an elongated rectangular block 3 constituting a magazinefor spaced pluralities of cores, each plurality of cores beingmaintained in edge to edge vertical relation spaced vertical slots 4 inthe front face of the block 3 as best shown in FIGS. 4, 5 and 9, thesaid front face of the block 3 carrying a cover plate 5 secured theretoby screws 6 to complete the enclosure of the magazine slots 4-.

Manually operable means for opening and closing the lower ends of theslots 4 is provided and comprises a metal plate 7 having parallel slots8, 8 extending therethrough adjacent each end of the block 3 and throughwhich slots screws 9, 9 extend to secure it to the bottom surface of theblock 3 with capacity to be moved for- Wardly and rearwardly by thehandle 10 to open the lower ends of the slots 4 or to cover said lowerends as required.

The base 1 carries a second pair of vertical posts 11, 11 disposedbeneath the forward edge of the block 3 and slidably mounted on saidposts is the core holding and positioning means generally indicated bythe numeral 12. The core holding and positioning means comprises anelongated metal body 13 having bores 14, 14 extending therethrough forsliding movement on the posts 11, 11 and further having top and bottomcover plates 15 and 16 to which further reference will be made. Screws15' secure the top plate to the body and corresponding screws v(notishown) similarly secure the bottom plate 16 to the body member 13.Additionally, the body 13 is provided with a plurality of parallelvertical botes 17 extending therethrough in the same laterally spacedrelation as the core magazine slots 4 and said bores are positioneddirectly under one each of said slots. Rotatably mounted in each of saidbores 17 is a shaft 18 said shafts extending above the top cover plate15 and each of said shafts carrying a head element 19 having an arcuate,core receivng slot 20 in the upper face thereof adapted to hold a coretherein in a vertical edgewise position with the hole in the coreexposed and with the vertical diametral line of a core in said slotsubstantially aligned with the shaft aXis.

The top surface of the body 13 of the core positioning means 12 isprovided with a longitudinally extending downwardly ofi set surfaceportion 21 extending from the front surface of the body member 13rearwardly to a point presently to be identified. The top plate 15 isprovided with a complementary downwardly extending surface portion 22 ofless width than the surface portion 21 and combines with said surfaceportion 21 to define a longitudinally extending, rectangular slot 23disposed for- Wardly of the vertical plane containing the axes of theshafts 18 and which slot affords guidance for a rack 24 having teethmeshing with gears 25 carried by alternate ones of the shafts 18; theupper surface of the body 13 being provided with counterbores 26surrounding the gears except for the point of engagement with the rack24 as best shown in FIG. 8, it being noted that the rear wall of theslot 23 is engaged by the ends of the rack teeth. The bottom cover plate16 and the bottom surface of the body member 13 are provided withcomplementary offset portions comprisng upwardly oifset bottom surfaceportion 27 on the body member 13 extending from the rear face of saidbody member to a point adjacent the bores for the shafts 18 and thebottom plate 16 is provided with an upwardly extending rear portion 28meeting the rearmost portion of the surface 27 which combines therewithto form a longitudinally extending rectangular slot 29 in which a rack30 is slidable; the teeth of said rack meshing with gears 31 on thelower ends of the alternate ones of the shafts 18 which do not carry thegears 25 and the gears 31 being disposed in counterbores in the bodymember 13 corresponding to the counterbores 26 in the top surface of thebody member.

The racks 24 and 34) extend beyond the opposite ends of the body member13 and are connected to move in unison by blocks 32, 32 extendng betweenthe opposed faces of the racks and secured to the ends of the racks byscrews 33; the distance between the blocks and the length of the bodymembers being such as -to limit the extent of reciprocation of theracks. Abutmen screws 34, 34 in the opposite ends of the body member 13engageable by the adjacert end faces of the blocks 32 atford means oflimiting the eXtent of travel of the racks. Having reference to FIGS. 2,7, 8, 11 and 13, it will be seen that as the rack unit comprisng theinterconnected racks 24 and 34) is moved from left to right, the shafts18 carrying the gears 25 and which mesh with the rack 24 will be causedto turn in a counterclockwise direction as viewed in top plan View whilethe alternate shafts having the gears 31 meshing with the rack 30 willbe caused to turn in a clockwise direction. Obviously, movement of therack unit from right to left will reverse the direction of turning ofthe shafts 18. The abutment screws 34, 34 serve to limit the extent ofturning movement that canbe imparted by the racks and thus determine therotative position to be occupied by cores that are seated in the heads19.

The base 1 forwardly of and adjacent the left hand post 2 is providedwith a short, vertically extending yoke member 35 scrving as the fulcrumpoint for one end of a hand lever 36 extending parallel to, inrear of,and below the core positioning means 12; said lever term nating in ahand engaging distal end 37 adjacent the right hand end of the base 1. Alink 38 pivotally con: nects the lever with the body member 13 at themidlength of said body member. compression springs 39, 39 surroundingthe posts 11, 11 tend constantly to urge the body member 13 upwardly tothe extent permitted by the nuts 40, 49 on the upper ends of the posts11, 11;` the distance being such as to permit cores to drop into thearcuate slots 20 in the shaft heads 19 while allowing the slide 7 topass between the cores so deposited and the lowermost cores in themagazine slots 4 whereby the de livery of a single core to each shafthead is efiected.- The lever 36 is employed to move the core holding andpositioning means downwardly against the bias of the springs 39, 39 fora purpose presently to be described.

Fixed to the top of the base 1 adjacent the forward edge thereof is atransversely extending vertical bracket member 41 and also mounted onsaid base slightly forwardly of the core positionng means 12 is acorresponding vert. cal rear bracket 42; said brackets serving tosupport, re spectively, the front and rear ends of a pair of laterallyspaced guide rods 43, 43 disposed above the top surface of the base 1and extending parallel to each other and to the top surface of the base.Slidably mounted or the rods 43, 43 is the Y axis wire insertng ;means44 comprising `a body member 45 carrying an upstandirtg bracket 46extending transversely along the rear edge thereof and supporting therear ends of a plurality of hollow needles 47 secured therein by setscrews 48; said needles' being disposed at the elevation of the axialline of cores C disposed in the grooves 20 of the core holding heads 19when the core holding and positioning means 12 is at the upper positionthereof established by the nuts 40. Rearwardly of the bracket 46, thebody member 45 s provided with a series of vertical posts 49 on each ofwhich a plurality of spools or bobbins B each carrying a supply of thewire employed to form the "Y" axes of the matrix to be formed and thewire from each bobbin is led through one each of the needles 47 and isthen bent back over the rearwardly extending end of the necdle.

Assuming that the magazine slots 4 are filled with pluralities of coresC and that each of the needles 47 has been supplied with a Y aXis wireextending therethrough, the operation of the device is as follows:

The rack unit is first postioned at its mici-travel position determined,for example, by the registry of a line 50 on the rack 24 With the end ofthe body member 13 and this positions all of the shafts 18 so that theslots 20 in the heads 19 carried by said shafts are disposed inalignment with the magazine slots 4. The plate or gate 7 is thenwithdrawn rearwardly allowing the cores in the magazine slots tomovedownwardly to the extent permitted by the arcuate slots 20; the nuts40, 40 being so adjusted that when the plate 7 is then moved forwardagain to close off the magazine slots 4, it will hold' the cores C whichhave entered the slots in the heads 19 against removal therefrom.Incidentally, since the cores are formed of paramagnetic material, theshafts 18 may be formed as permanent magnets or, as shown in FIG. 13,each of said shafts may extend below the bottom plate 16 and carry asolenoid coil 51 to supply magnetic force tending to hold the coreseated in the slot 20 in the head 19 of the shafts.

After the plate or gate 7 has been moved forward, the

&174314 cores occupy the position thus shown in FIGS. 3, 5 and 6 withthe axes thereof substantially coincident with each other in ahorizontal line. An X' axis wire is then inserted through all of thealigned cores as best shown in FIGS. 5 and 6, the wire first beinginserted through a fine hollow tube or needle 47' with the end thereofbent over the inserted end of the tube. For the very small sizes ofcores above described, the metal tubing employed for forming the smallersizes of hypodermic needles is satisfactory. When the tube has beeninserted through all of the aligned cores as shown in FIG. 5, the hookedend of the wire is held and the tube is withdrawn from the cores leavingthe X axis wire inserted in the cores. A considerable length of the saidwire is left at each end of the cores.

The rack unit is then moved to one or the other of its extremes ofmovement as, for example, to the left resulting in rotation of theshafts 18 and the cores carried thereby in opposite directions forslightly less than a quarter turn Whereby the axial lines of the coresare disposed at acute angles to a horizontal line normal to the firstidentified horizontal line. The Y" axis wire inserting means is thenmoved forwardly on the guide rods 43 by grasping the handle 54 on thebase 45 thereof with the result that each needle 47 with its Y axis wireis inserted through one of the cores in the core holding means. Whilethe needles are still penetrating the cores as shown in FIG. 9, thelever 36 is moved downwardly pulling the cores out of the slots in theheads 19 and leaving the row of cores with the inserted "X axis wireshanging on the needles 47. The subassembly unit compn'sng a row of coreswith an X axis wire extending therethrough is pulled back on the needles4-7 as far as it will go and the Y axis wire inserting means is thenmoved back ou the rods 43 away from the core holding and positioningmeans. The core holding and positioning means 12 is then allowed toresume its normal upward position, the rack unit is then centered tobring the Slots in the heads 20 again in alignment with the magazineslots 4, the plate 7 is withdrawn and replaced to allow a second seriesof cores to be delivered to the holding heads 19. An "X wire is insertedthrough this second series of cores and the needle by which the wire wasinserted is withdrawn leaving the X wire in this second series of cores.The rack unit is then moved in the opposite direction to the limitpermitted by the stop screws 34 with the result that the cores held inthe Slots 29 are rotated less than a quarter revolution in the oppositedirections, whereupon the Y axis wire inserting means is again advancedto project its wires to the second subassembly of cores and X wire. Thecore positioning means is again depressed by the lever and the secondseries or subassembly of cores and X` axis wire is pressed back on theneedles 4-7. The reason for thus rotating the cores preferably less than90 is to avoid the possibility of rupturing any core by reason of thebending of the previously inserted "X axis wire.

This cycle of Operations is continued until the required number of coresis thus assembled on the various wires. The ends of the various wireswith a great deal of excess wire are temporarily interconnected and thethus formed assembly of the cores and wires is ready for mounting on thesupporting frame or base F" as shown, for example, in FIG. 1.

As before related, the usual dimensions of a matrix is that of 64 rowsof these cores of 64 cores each. The device shown in these figuresaccommodates a lesser number of cores but this has been done purely byway of illustration of the invention. It being believed to be obviousthat following the principles of the specification suitable apparatusfor accommodating any desired number of cores may be provided.

Thus there has been provided an apparatus by which the interlaced coresand X and Y axis wires of computer memory matrices may be more readilyand eco- 6 nomically assembled by persons having a lesser degree ofskill than has heretofore been necessary.

While the foregoing specification discloses a presently preferredembodiment of the invention, the nvention is not to be deemed to belimited to the precise details of such disclosure. For example, whilethe foregoing disclosure contemplates the attachment of the axis wiresto the various hollow needles prior to the insertion of the needlesthrough the cores, it will be obvious that the needles can first beinserted and the wires then be passed through the needles, wherefore, itwill be understood that the invention includes as well all such changesand modifications in the parts and in the construction, combination andarrangement of parts as shall come within the purview of the appendedclaims.

I claim:

1. In an apparatus for assembling computer memory matrices, a base, aplurality of core supporting means on said base for supporting one eachof a plurality of matrix cores in a horizontal row and disposed eitherin a first position in which the axi-al lines of said plurality of coresare substantally coincident with each other for reception of an axiswire extending through the thus aligned cores or in a second position inwhich the axial lines of said plurality of cores are disposed at suchangul-ar relatons to said first position as will accommodate separateentry through each core of one each of a plurality of other axis wiresextending in spaced parallel relation to each other in a directionnormal to the direction of said first-named wire in the completedmatrix, means for simultaneously moving said core supporting means andthe cores supported thereby to and from said first and second positions,means for supporting a plurality of said other axis wires in spacedparallel relation in a horizontal plane containing the openings in coresin said core supporting means and aligned one each with the opening inone each of the cores in said supporting means, and means for efectingrelative movement between said core supporting means and said pluralityof other axis wires in a direction parallel to said wires effective toproject the ends of said plurality of other axis wires simultaneouslythrough the algned ones of the cores held by said core supporting meanswhen in said second position thereof.

2. An apparatus as claimed in claim 1 in which said core supportingmeans includes a plurality of core holding head elements disposed in ahorizontal line on the upper surface of a support and the top surface ofeach of said head elements having a first slot extending transverse tosaid horizontal line and a second slot disposed at least substantiallyparallel to said horizontal line; said slots having the bottom surfacesthereof conforming to the outer peripheries of the cores with a maximumdepth subtantially equal to the radial width of the cores and being of awidth closely tting the side surfaces of the cores and said soltsintersecting each other at their midlength.

3. In an apparatus for assernbling computer memory matrices including aplurality of matrix core elements each having an opening extendingtherethrough, a base, and a plurality of means on said base eachprovided with a slot for holding one each of a plurality of matrix coresin a common horizontal plane and disposed in a vertical, edgewiseposition in a row and with the openings in the cores exposed and thecores being disposed either with the axial lines thereof substantiallycoincdent with each other in a first horizontal line for reception of anaxis wire extending throuhg the aligned cores or in selected positionsin which the axial lines thereof are disposed at acute angles to asecond horizontal line normal to said first horizontal line for separateentry through each core of one each of a plurality of other axis wireswhich will extend in spaced, parallel relation to each other in adirection normal to the direction of said first-named wire in acompleted matrix, a core supply magazine means mounted on said base andincluding separate magazines each holding a plurality of cores for anassociated one of each of said plurality of core holding means, andmeans associated i with said magazine means manually operable forsimultaneously feeding one core to each of said core holding means fromthe associated magazine and to simultaneously close all of said magazinemeans.

4. An apparatus as claimed in claim 3 in which said core Componentholding means includes a plurality of core holding head elementsdisposed one each beneath one each of the core supplying magazine meansof said supply means and in which said feeding means for supplying coresto said core holding head elements cooperates with said head elements tomaintain cores supplied thereto from being dislodged therefrom.

5. An apparatus as claimed in claim 3 in which all of said core holdingmeans are mounted for rotation about vertical axes in a supportingelement mounted on said base, in which said axes are each substantiallycoincident with a vertical diametral line of a core held thereby, and inwhich said supporting element further includes devices forsimultaneously effecting rotation of said core holding means about saidvertical axes between extreme positions in which a plurality of coresheld one each in each of said holding means 'are disposed with the axiallines thereof extending at acute angles to said second horizontal lineand an intermediate position in which said axial lines of said cores aresubstantially coincident with 'each other and With said first horizontalline.

6. An apparatus as claimed in claim 5 in which said devices foreffecting rotation of said core holding means include interengagingComponents operative to cause simultaneous rotative movement of adjacentones of said core holding means in opposite directions.

7. In an apparatus for assembling computer memory matrices, a base, acore supporting means mounted on said base including a supportingelement carrying a pluralty of core holding head elements disposed in ahorizontal line on the upper surface of said supporting element andmounted on said supporting element for rotation about separate verticalaxes lying in a common vertical plane and coincident with the verticaldiametral line of a core held thereby; each of said head elements havinga curved slot in the upper face thereof conforming to the outerperiphery and thickness of the cores and having a maximum depthsubstantially equal to the radial width of a core, means on saidsupporting element for simultaneously effecting rotation of said coreholding means about 'said vertical axes between extreme positions inwhich a plurality of cores held one each in each of said holding meansare disposed with the axial lines thereof extending at acute angles to asecond horizontal line extending at right angles to said firsthorizontal line and an intermediate position in which said axial linesare sub.- stantially ,coincident with each other and said firsthorizontal line, and other means mounted .on said base for reciprocationin a horizontal plane in a path parallel to said second horizontal lineoperable to engage said plurality of cores for the insertion in one eachof said cores of one each of a plurality of axis wires.

8. In an apparatus for assembling computer memory matrices, a base, acore supporting means mounted on said base including a supportingelement carrying a plurality of core holding head elements disposed in-a horizontal line on the upper surface of said supporting element andmounted on said supporting element for rotation about separate verticalaxes lying in a common vertical plane and coincident with the verticaldiametral line of a core held thereby; each of said head elements havinga curved slot in the upper face thereof conforming to the outerperiphery and thickness of a core and having a maximum depthsubstantially equal to the radial width of a core, means on saidsupporting element for simultaneously eltecting rotation of said coreholding means about said Vertical axes between extreme positions inwhich a plurality of cores held one each in each of said holding meansare disposed with the axial lines thereor" extending at acute angles toa second horizontal line extending normal to said first horizontal lineand an intermediate position in which said axial lines are substantiallycoincident with each other and said first horizontal line, other meansmounted on said base for reciprocation in a horizontal plane in a pathparallel to said second horizontal. line operable to engage saidplurality of cores for the insertion in one each of said cores of oneeach of a plurality of axis wires, and means for dislodging saidpluralty of cores from said holding means while retaining them on saidlast-named means for inserting aXis wires therethrough.

References Cited by the Examiner UNITED STATES PATENTS 2351832 8/44Wagner 29-203 2,958,126 11/60 Shaw et al. 29-241 X 2,985,948 5/ 61Peters 29-433 3,064,339 11/62 Kalbow 29-203 3,G68,554 12/62 Pouget29-1555 3,098,291 7/ 63 Pizzi et al 29-203 3, l29,494 4/ 64 Perkins29--241 WHITMORE A. WILTZ, Primary Exam'ner.

JOHN F. CAMPBELL, THOMAS H. EAGER,

Exam'ers.

1. IN AN APPARATUS FOR ASSEMBLING COMPUTER MEMORY MATRICES, A BASE, APLURALITY OF CORE SUPPORTING MEANS ON SAID BASE FOR SUPPORTING ONE EACHOF A PLURALITY OF MATRIX CORES IN A HORIZONTAL ROW AND DISPOSED EITHERIN A FIRST POSITION IN WHICH THE AXIAL LINES OF SAID PLURALITY OF CORESARE SUBSTANTIALLY COINCIDENT WITH EACH OTHER FOR RECEPTION OF AN AXISWIRE EXTENDING THROUGH THE THUS ALIGNED CORES OR IN A SECOND POSITION INWHICH THE AXIAL LINES OF SAID PLURALITY OF CORES ARE DISPOSED AT SUCHANGULAR RELATIONS TO SAID FIRST POSITION AS WILL ACCOMMODATE SEPARATEENTRY THROUGH EACH CORE OF ONE EACH OF A PLURALITY OF OTHER AXIS WIRESEXTENDING IN SPACED PARALLEL RELATION OF EACH OTHER IN A DIRECTIONNORMAL TO THE DIRECTION OF SAID FIRST-NAMED WIRE IN THE COMPLETEDMATRIX, MEANS FOR SIMULTANEOUSLY MOVING SAID CORE SUPPORING MEANS ANDTHE CORES SUPPORTED THEREBY TO AND FROM SAID FIRST AND SECOND POSITIONS,MEANS FOR SUPPORTING A PLURALITY OF SAID OTHER AXIS WIRES IN SPACEDPARALLEL RELATION IN A HORIZONTAL PLANE CONTAINING THE OPENINGS IN CORESIN SAID CORE SUPPORTING MEANS AND ALIGNED ONE EACH WITH THE OPENING INONE EACH OF THE CORES IN SAID SUPPORTING MEANS, AND MEANS FOR EFFECTINGRELATIVE MOVEMENT BETWEEN SAID CORE SUPPORTING MEANS AND SAID PLURALITYOF OTHER AXIS WIRES IN A DIRECTION PARALLEL TO SAID WIRES EFFECTIVE TOPROJECT THE ENDS OF SAID PLURALITY OF OTHER AXIS WIRES SIMULTANEOUSLYTHROUGH THE ALIGNED ONES OF THE CORES HELD BY SAID CORED SUPPORTINGMEANS WHEN IN SAID SECOND POSITION THEREOF.